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+//Electric machines and power systems by Syed A Nasar
+//Publisher:TataMcgraw Hill
+//Year: 2002 ; Edition - 7 
+//Example 2.2
+//Scilab Version : 6.0.0    ; OS : Windows
+
+clc;
+clear;
+
+bg=1;                        //flux density of air gap in T
+u0=4*3.14*10^-7;             //permiability of free space 
+lg=0.1*10^-3;                //length of air gap in m
+sf=0.9;                      //stacking factor of M19 steel
+lm=100*10^-3;                //length of the steel in m
+h=130;                       //flux density in At/m
+
+hg=bg/u0;                    //magnetic field intensity in A/m
+fg=hg*lg;                    //reluctance drop or magnetic potential across gap in A
+bm=bg/sf;                    //flux density in magnetic material in T
+Fm=h*0.1;                      //magnetic potenial of other member in At
+AT=Fm+fg;                      //the required ampere turn in At
+
+printf('the required ampere turn in the exciting coil is %2f in At',AT)
+
+
+